Virtual Manipulatives - Geoboard Coordinate

I like this manipulative found under Geometry grades 3-5. This is similar to the basic geoboard manipulative where the students can place rubber bands and make shapes. It also shows the perimter and the area of each shape. This coordinate manipulative is useful to introduce students to the 4 quadrants and negative numbers. I have been working with my students on graphing ordered pairs and this allowed them to continue to explore the negative numbers and get comfortable working with them while creating their own designs.